You let her know you’re interested in her, I’m 45 and I have had a lot of younger guys interested in me. Most are not direct enough. i never wanted to show interest first because I didn’t want to be turned down or have someone say “this old lady tried to hit on me”. I want to be sure you’re interested. If you want to be with her more than once then make sure you know how to please her and can last more than 5 minutes. Don’t start to catch feelings because from my experience older women don’t usually want a relationship with someone much younger. We don’t want to go out and be mistaken for your mother.